package com.erification.web.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MainFilter implements Filter {

	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		
		HttpServletRequest request = (HttpServletRequest) arg0;
		HttpServletResponse response = (HttpServletResponse) arg1;
		String username = (String) request.getSession().getAttribute("username");
		if(username != null) {
			arg2.doFilter(arg0, arg1);
		} else {
			response.sendRedirect(request.getContextPath() + "/login.jsp");
		}
		
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
	}

}
